Finishing machine



Sept. 25, 1928.

' T. LUND FINISHING MACHINE Filed Sept. 14, 1925 Patented Sept. 25, 1928.

UNITED STATES PATENT OFFICE.

THOMAS LUND, OF

EBY CORPORATION, OF I ATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

V FINISHING .MACHINE.

Application filed September 14, 1925 Serial No. 56,266.

This invention relates to finishing machines for boots and shoes and is illustrated as embodied in a niachine for burnishing the peripheries of the soles and heels of boots and shoes.

' For performing edge-setting operations on the other hand, for a good deal of the less expensive work, edge-setting machines employing rotary edge-setting tools are used, because such machines are less expensive, and'their operation requires less skill on the part of the operators. Rotary edge-setting machines, however, are subject to the limitation that rotary edge-setting tools are not well adapted for treating the portions of a sole edge closely adjacent tothe breast of the heel because of the liability ,of scarring the heel if a rotary tool is operatedtoo close tothe' heel breast.

In View of the foregoing, it is an object of this invention to provide an improved burnishingmachine having the characteristic advantages of burnishing machines employing rotary burnishing tools, and which at the same time will overcome the difiiculty above referred to. This object is attained in the illustrated construction by the provision of a novel edge-setting machine of the type employing both a vibratory burnishing tool and a rotary herein illustrated, being positioned closely adjacent to one another to facilitate transferring work from one to the other and being actuated from a common shaft, thus providing a simple, compact andeflicient machine organization. Y In many shoes the edge of the solo at the shank adjacent to the breast of the heel is square, that is, approximately at right an gles to the tread surface at the outer side of the shoe shank and curved or oblique to the tread surface at the inner side of said shoe shank. Accordingly, anotherobject of the invention is to devise an improved burnish in g tool of the vibratory type, which is constructed and arranged for use either upon square ec ge shanks or curved edgeshanks, said tool, as illustrated, being provided with suitable burnishing tool, these tools,

rand crease guiding projections adjacent to the respective burnishing surfaces;

'lhese and other features of the invention BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHIN- I are described in the following specification taken in connection with the accompanying drawings, in which:

Fig. 1 is a perspective view of a finishing machine constructed in accordance with my invention; 7 I v Fig. 2 is a section through the tool-carrying shaft adjacent to the carrier for a vibratory tool;

Fig. 3 is a fragmentary view of a portion of the tool-carrying shaft showing an eccentrically formed portion thereof, much exaggerated; and I Figs. 4 and 5 are detailed views illustrat ing the application of my novel tool to the curved and square edges of a sole, respectively.

The illustrated burnishing machine{ as shown in Fig. 1, may be mounted either upon a pedestal 10 or upon a bench (not shown) and comprises a frame 12 in which there is supported a main shaft 14 directly connected to the shaft of a driving motor 16. A toolcarrying shaft 18 is also supported in bearings in the frame and suitably driven as by means of a: chain (not shown), Within a casing 19, from the main shaft 14. This shaft 18 projects at the left-hand side of the frame 12 and is provided'with a rotary forepart burnishing tool 20 and a rotary shank burnishng tool 22. Thus these tools are adapted for treating shoes which, for example, have square sole edges on the outer sides of their shanks and curved edges on the inner sides of their shanks.

It will be understood that .the surfaces of the forepart tool 20 are arranged for burnishing a so-called square sole edge which, as above explained, extends approximately at right angles to the tread surface of the sole and may, accordingly, be used for burnishing a square edge of the shank of a sole up toa position slightly separated from the breast of the heel. On the other hand, the shank curved sole edge surface and is therefore suit-able for treating a curved shank edge from its junction with the forepart of the sole at the ball line, to a position slightly spaced from the breast of the heel upon the lnside of theshoe. r

burnishing tool 22 is adapted for treating a I all) Any suitable arrangement may be provided for heating these tools. In the illustrated construction the tool carrying shaft 18 is made hollow, and an electric heating unit 24h (Fi 3) -is inserted within the hollow shaft. Curtheother side of the curved burnishing surrent may be supplied to sucha unit in a well known manner by means of collector rings (not shown) which, in the illustrated machine, are mounted on the shaft 18 within a casing 26 formed integrally with the frame 12 of the machine. 7

The portion of the tool-carrying shaft 18 whichlies between the rotary forepart tool 20and a bearing 28 formed integrally with the frame 12 is made slightly eccentric; Such eccentricity. greatly exaggerated, is illustrated at 30 in Fig. 3. A bracket arm 32 formed upon the bearing 28 supports a pin $tacting as a pivot for a tool-carrying arm 36 which is provided at its outer end with a stud 38 and a retaining spring 40, both of usual construction, by means of which a vibratory burnishing tool 42 is held upon thearm. The toolcarrying arm 36 is slotted at 14- and within this slot-ted portion rides a suitably formed block 46 provided with a bearing -18 surrounding and closely engaging the eccentric po tion 30 of the tool-carrying shaft 18 which transforms the rotary moven'ient of said shaft to a vibratory movement of the tool carrying arm 36 and the tool 42. As the arm 36 is moved the'tool is given a vibratory moven'ient 1 up and down in a plane generally vertical but sloping inwardly away from an operator standing in front of the machine. It will be noted from an inspection of F 1g. 1 that the outer left-hand edges of the tool-carrying arm 36 are chainfered to prevent possible interference between work being applied to the rotary forepart tool 20 and said arm. In order to, facilitate t'reatingboth curved and square shank edges closely adjacent to the heel breast, the vibratory burnishing tool 4-2 is given a novel construction, as best shown in Figs. 4 and 5, from which it will be seen that it comprises a. shank portion 50 recessed at 52 for the reception of the stud 38 of the tool-carrying arm 36 and notched at 5 1 for the reception of the end of the retaining spring 10. At the end of this shank portion 50 is mounted a burnishing head 56 whiclris provided with a socalled flat burnishing surface 58 and a curved burnishing surface 60 disposed side by side and separated by a rand crease guiding projection, or lip 62, one side of which forms a continuation of the curved surface 60. This lip 62 lies alongside the flat burnishing surface 58 and is used by the operator to; assist in guidingthe work when a square-edged shank 64 is to be treated close to theheel breast. It will be understood that the so-called flat surface 58 is in reality slightly curved about an axis adjacent to the pin 3% (see Fig. 2) in a manner well understood in the construction of vibrating burnishing there ried back .to the tools. It will also be understood that the curved burnishing surface 60 is also slightly rounded about the same axis. Another lip' 66, serving as a rand crease guiding projection, isalso formed upon the tool, ad acent to face 60 and this lip 66 is used by the operator when working upon curved shank surfaces 68 (Fig. {1) adjacent to the heel breast.

Preferably, and in order that the machine may be used for burnishing the peripheral surfaces of heels as well as the edges of soles, another tool-carrying shaft 70 is mountedin suitable bearings in the machine and driven in any desired manner from the main shaft 14 by means of driving connections contained within a protective casing 72. A heelsburnishingtool or pad 74 is mounted upon this shaft'while upon the outer end of the shaft is provided a beading tool 76 heated frictionally by means of a rubbing clamp 78 in a manner well understood in the art. If desired, a finishing brush 80 may be mounted upon the outer end of the shaft 14 in aposition where it plication of work to either the tools upon the tool-carrying shaft 18 or those upon the other tool-carrying shaft 70. A receptacle 82 mounted upon the frame of the machine at the rear is utilized for holding cleaning and repairing materials or waxes. H

In the presentation of work to the machine the operator will always hold a shoe with the treadface of the sole to the right (as viewed in Fig-s51, t'and 5) and will present the edge of the sole on one side closely adjacent to the heel breast to the appropriate portion of the vibratory burnishing tool 42, then to the rotary burnishing tools 20, and 22 successively so that, with a substantially continuous movement of the shoe about an imaginary axis, the edge of the sole will be finished from the heel breast upon one side of the shoe up to a position closely adjacent to the heel breast on the other side. The work will then be carnearby vibratory tool 42 and the remaining portion of the sole will be tool, guiding the work by means of the corresponding rand crease guiding projection or lip 62 or 66 as the case may be. Thus when a shoe for a left foot is being treated, assuming that the and has a square shank sole edge on its outer side and a curved edge on itsinner side, the operator may start holding the shoe with the tread face 7 to the right and with the toe pointing upward and apply the outer shank of the shoe to the burnishing surface 58.to finish the square edge of the shank closely adjacent to the heel breast. Hethe'n will'transfer the shoe to the rotary burnishing tool 20 and witha single sweeping motion complete the burnishing of the forepart or squareedged portion of the sole of the shoe so that does not interfere with the apshoe is of the type referred to the toe is then projecting downwardly. He then will transfer the shoe to the shank-burnishing tool 22 to finish the curved inner shank from the point of intersection of the squared and, curved edges of the sole up to a position slightly spaced from the heel breast at the inner side of the shank. The work will then be carried back to the vibratory tool 42, and guiding the work by means of the lip 66, the remainder of the curved edge of the shank will be treated upon the curved burnishing surface 60 close up to the breast of the heel. If it is desired to burnish the periphery of the heel, the shoe will also be applied to the tools 7 4 and 76, respectively, and, if desired, the brush may be used to give a final polish to all parts of the periphery of the bottom of the shoe. 1

A like sequence of operations will be carried out if a shoe for the right foot is being .presented, except that the various surfaces will be treated in a. reverse order, it being remembered that the shoe is always held with the tread face of the sole toward the right and will usually be presented in inverted position from that in which the shoe for the other foot was presented, according to the wishes and habits of the operator.

Tl'ius it will be seen that there is provided a compact and an efficient machine of simple and rugged construction by means of which all of the periphery of the sole and heel of a shoe may be treated in successive operations upon tools positioned closely adjacent to one another, which, in the case of the edge-setting tools, are actuated from a single shaft. The relative position of the various tools is of great consequence in facilitating the rapid manipulation of work and the presentation thereof to the machine, because it enables an operative, with a minimum of movement and without changing his stance, to present all of the periphery of the sole from the heel breast line upon one side to the heel breast line upon the other side in a series of operations which are substantially continuous with one another.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a burnishing machine, a rotary shaft, a circular tool mounted on said shaft and provided with. a burnishing surface on its periphery, said shaft being formed with an eccentric portion, a pivoted arm upon said machine having a slotted portion co-operating with the eccentric on said shaft to vibrate the arm, and burnishing tool secured to the outer end of said arm for vibration therewith, whereby the greater portion of the edge of the sole of a shoe may be burnished by means of the rotary tool and the portion adjacent to the heel-breast may be finished by means of the vibratory tool.

2. In a burnishing machine, a rotary shaft,

a rotary forepart burnishing tool secured to said shaft, a rotary shank burnishing tool secured to said shaft adjacent to'said first tool, said shaft being'provided with an eccentric portion adjacent to one of said tools, a toolcarrying arm associated with said eccentric portion and arranged to be vibrated thereby, and a burnishing tool secured to said arm for vibration therewith, whereby the greater portion of the edge of the sole of a shoe may be burnished by means of the rotary tools and the portion adjacent to the heel-breast may be finished by means of the vibratory tool.

3. A burnishing machine comprising a rotary shaft, a forepart edge setting tool mounted for rotation with said shaft, a shank edge setting tool mounted for rotation with said shaft and adjacent to said first tool, said shaft having an eccentric port-ion adjacent to one of the tools, be vibrated by said eccentric portion of the shaft, and an edge setting tool secured to said arm for vibration therewith.

4. A burnishing machlne comprising a rotary shaft, a rotary forepart edge setting tool secured to said shaft, a rotary shank edge set ting tool secured to said shaft adjacent to the first tool, a tool carrying arm, an edge setting tool secured to said arm, and means connecting said arm with said shaft constructed and arranged to vibrate said arm and the tool carried thereby upon rotation of the shaft.

5. In a burnishing machine, a rotary shaft, a rotary forepart burnishing tool secured to said shaft, a rotary shank burnishing tool secured to said shaft adjacent to said first tool, said. shaft being provided with an eccentric portion adjacent to one of said tools, a toolcarrying arm associated with said eccentric portion and arranged to be vibrated thereby,

and a burnishing'tool secured to said arm for vibration therewith, said vibratory tool being provided with adjacent surfaces adapted to treat a curved shank edge and a square shank edge, respectively, whereby the greater portion of the edge of the sole of a shoe may be burnished'by means of the rotary tools and the portions adjacent to the heel-breast may be burnished by means of the vibratory tool.

6. In a machine for burnishing the edges of shoe soles, a vibratory tool having attaching means atone end and provided at the other end with adjacent edge burnishing surfaces, one of said surfaces being substantially flat so that it is adapted to treat a square edge portion of the sole, said adjacent edge burnishing surface having a curved contour receding toward the attaching means so that it is adapted to treat a rounded edge portion of the sole, and a rand crease guiding lip on said tool between, said surfaces projecting beyond both burnishing surfaces and so related to the flat surface that it will enter the rand crease to serve as a guide for the tool when the fiat burnishing surface is applied to the square portion of the edge of the sole,said

a tool carrying arm arranged to lUt) receding burnishing surface being" then adapted to overlie the shoe upper out of contact therewith.

'7. In a burnlshing machine, a vibratory 7 tool provided with a substantially flat edgeburnishing surface adapted to treat a square sole edge and With an adjacent edge-burnishing surface having curved contour adapted to treat a rounded sole edge, and a rand crease V guidinglip projecting from said tool between lips pIOjGCtihg from said-'tool'upon either side of the curved" surface so that one of said lips is between the two surfaces and serves as a guide forwork presented to the first named surface and the other lip serves as a guide for Work presented tothe curved surface.

.9. In a burnishing machine, a vibratory tooi'provided Witha shank, a head having a burnishing' surface disposed substantiaily at right angles to the axisof the shank of the .tool and withacurvcd burnishing surface angular-1yrelated to said EIXIS aIId guiding lips pro]ecting fromsaid tool on either side of one of saidsurfaces sort-hat-i-one of said lips is between the two surfaces and serves as a. guide for .Work presented to one surface and so that the other lip serves as a guide for work presented to the other surface.

In testimony whereof have signed ny name to this specification. V

THOMAS LUN 

